In Situ Observation of Fracture Behavior of Bamboo Culm

Zou, Linhua; Li, Xiaodong

doi:10.1007/s11837-021-04661-7

Cited by 11 publications

(4 citation statements)

References 21 publications

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“…Recent studies reported that fiber bundles in bamboo achieve high strength and toughness with crack bridging and fiber pull-out against applied loads. [29,30] The interesting failure mechanism of BF/PLA/PLA-g-STMAH can be understood in detail by the following mechanism (see Figure 5). Given that individual filament threads were partially partitioned by the interfacial void channels, each filament thread was fully subjected to the local range of shear stress caused by the embedded fibers, highly oriented in the tensile load direction.…”

Section: Resultsmentioning

confidence: 99%

“…Recent studies reported that fiber bundles in bamboo achieve high strength and toughness with crack bridging and fiber pull‐out against applied loads. [ 29,30 ]…”

Section: Resultsmentioning

confidence: 99%

“…3D printing has been used to represent such a sophisticated structure, and explore the structure-property relationships in bioinspired and biological materials. [29,30] As aforementioned, most studies have recognized the high degree of orientation of reinforcing materials, which are guided during the 3D printing process, as being positive in terms of strength reinforcement; [31,32] in our previous works, the fiber alignment in various printing conditions, such as print pattern and fiber concentration, has been thoroughly investigated and comprehensive comparisons with the conventional engineering composites in terms of microstructure and mechanical properties have been addressed as well. [33,34] Our results demonstrated that precise fiber adjustment of 3D printing fabricates sophisticated microstructures and determines correlating mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

“…3D printing has been used to represent such a sophisticated structure, and explore the structure–property relationships in bioinspired and biological materials. [ 29,30 ]…”

Section: Introductionmentioning

confidence: 99%

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Outstanding Strengthening and Toughening Behavior of 3D‐Printed Fiber‐Reinforced Composites Designed by Biomimetic Interfacial Heterogeneity

Hwang

Lee

et al. 2021

Advanced Science

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3D printing of fiber‐reinforced composites is expected to be the forefront technology for the next‐generation high‐strength, high‐toughness, and lightweight structural materials. The intrinsic architecture of 3D‐printed composites closely represents biomimetic micro/macrofibril‐like hierarchical structure composed of intermediate filament assembly among the micron‐sized reinforcing fibers, and thus contributes to a novel mechanism to simultaneously improve mechanical properties and structural features. Notably, it is found that an interfacial heterogeneity between numerous inner interfaces in the hierarchical structure enables an exceptional increase in the toughness of composites. The strong interfacial adhesion between the fibers and matrix, with accompanying the inherently weak interfacial adhesion between intermediate filaments and the resultant interfacial voids, provide a close representation of the toughness behavior of natural architectures relying on the localized heterogeneity. Given the critical embedment length of fiber reinforcement, extraordinary improvement has been attained not only in the strength but also in toughness taking advantage of the synergy effect from the aforementioned nature‐inspired features. Indeed, the addition of a small amount of short fiber to the brittle bio‐filaments results in a noticeable increase of more than 200% in the tensile strength and modulus with further elongation increment. This article highlights the inherent structural hierarchy of 3D‐printed composites and the relevant sophisticated mechanism for anomalous mechanical reinforcement.

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Section: Resultsmentioning

confidence: 99%

“…Recent studies reported that fiber bundles in bamboo achieve high strength and toughness with crack bridging and fiber pull‐out against applied loads. [ 29,30 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…3D printing has been used to represent such a sophisticated structure, and explore the structure–property relationships in bioinspired and biological materials. [ 29,30 ]…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations